From hvasiliev@delphi.com Wed Nov 02 14:40:14 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!hvasiliev From: hvasiliev@delphi.com (Hugo Vasiliev) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov02.144014.3625@delphi.com> Date: Wed, 02 Nov 1994 14:40:14 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Hugo Vasiliev Tape trading list upon request. SASE required for international mail. From vgirard@pipeline.com Thu Nov 03 05:36:14 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!vgirard From: vgirard@pipeline.com (Valeria Girard) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov03.053614.1936@pipeline.com> Date: Thu, 03 Nov 1994 05:36:14 GMT References: <1994Nov02.144014.3625@delphi.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Nov02.144014.3625@delphi.com>, hvasiliev@delphi.com (Hugo Vasiliev) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Valeria Girard SupraFAXModem 28.8 @ 28,800 bps "Tape doesn't lie at 02:14. Ears do." From kchoi@inria.fr Thu Nov 03 23:08:14 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!kchoi From: kchoi@inria.fr (Kenji Choi) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov03.230814.8393@inria.fr> Date: Thu, 03 Nov 1994 23:08:14 GMT References: <1994Nov02.144014.3625@delphi.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Nov02.144014.3625@delphi.com>, hvasiliev@delphi.com (Hugo Vasiliev) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Kenji Choi === Dept of Electrical Engineering, INRIA Rocquencourt "Do not worship the copy." From pfischer@inria.fr Sat Nov 05 01:01:14 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!pfischer From: pfischer@inria.fr (Pavel Fischer) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov05.010114.9053@inria.fr> Date: Sat, 05 Nov 1994 01:01:14 GMT References: <1994Nov02.144014.3625@delphi.com> <1994Nov03.053614.1936@pipeline.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Nov03.053614.1936@pipeline.com>, vgirard@pipeline.com (Valeria Girard) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Pavel Fischer Tape trading list upon request. SASE required for international mail.